Complete the following sentences, using the correct forms of the words from 1.

1. People in these mountainous areas still ______ their local customs and traditions.

2. The invention of the seat belt made a good ______ to road safety.

3. We believe that ______ of these old structures will benefit the community in many ways.

4. The aim of the culture festival is the ______ of friendship and tourism.

5. In 2006, Duong Lam became the first village that was ______ as a national historic and cultural relic.